diff options
| author | Simon Wunderlich <simon.wunderlich@s2003.tu-chemnitz.de> | 2011-11-30 16:56:33 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-12-06 16:05:25 -0500 |
| commit | ff3cc5f40f36db1a60a8f1051be7fbc92233419b (patch) | |
| tree | 9348704f13be3aa3985aa1dc54cb8bf7e4d9af32 /net/mac80211/agg-tx.c | |
| parent | 54858ee5bf659f80a784303e41ee8898fd163f98 (diff) | |
mac80211: handle protection mode, RIFS and ADDBA for HT IBSS
* Follow 802.11n-2009 9.13.3.1 for protection mode and ADDBA
* Send ADDBA only to HT STAs - implement 11.5.1.1 partially
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/agg-tx.c')
| -rw-r--r-- | net/mac80211/agg-tx.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c index 2c2e9519a2e7..9bfe28c9ab59 100644 --- a/net/mac80211/agg-tx.c +++ b/net/mac80211/agg-tx.c @@ -430,6 +430,27 @@ int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid, return -EINVAL; } + /* + * 802.11n-2009 11.5.1.1: If the initiating STA is an HT STA, is a + * member of an IBSS, and has no other existing Block Ack agreement + * with the recipient STA, then the initiating STA shall transmit a + * Probe Request frame to the recipient STA and shall not transmit an + * ADDBA Request frame unless it receives a Probe Response frame + * from the recipient within dot11ADDBAFailureTimeout. + * + * The probe request mechanism for ADDBA is currently not implemented, + * but we only build up Block Ack session with HT STAs. This information + * is set when we receive a bss info from a probe response or a beacon. + */ + if (sta->sdata->vif.type == NL80211_IFTYPE_ADHOC && + !sta->sta.ht_cap.ht_supported) { +#ifdef CONFIG_MAC80211_HT_DEBUG + printk(KERN_DEBUG "BA request denied - IBSS STA %pM" + "does not advertise HT support\n", pubsta->addr); +#endif /* CONFIG_MAC80211_HT_DEBUG */ + return -EINVAL; + } + spin_lock_bh(&sta->lock); /* we have tried too many times, receiver does not want A-MPDU */ |